Floor drain



FIG. 1 is a right side elevational view of a floor drain showing my newdesign, the left side being a mirror image of the right side shown;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a rear elevational view thereof; and

FIG. 5 is a bottom plan view thereof.

The ornamental design for a floor drain, as shown and described.